[21 p-maternal in duplicate in a case of trisomy 21].
D000293:Adolescent; D002455:Cell Division; D002904:Chromosomes, Human, 21-22 and Y; D006801:Humans; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D010641:Phenotype; D014314:Trisomy
21 p-maternel en double exemplaire chez un trisomique 21.